Eigenmath can be downloaded for free at: eigenmath.sourceforge.netNintendo DS Version: sourceforge.net/projects/eigenmatdsThe Eigenmath manual is located in the help section of Eigenmath's websiteEigenmath works on Windows, Mac OS X, and Nintendo DS. The program is comparable to a TI graphing calculator. It can also be referred to as a lite version of Mathematica, Maple or Matlab.Since this program is free and works like a graphing calculator. Schools and libraries should have this program installed on their computer systems. This program is a wonderful tool for use with mathematics.This tutorial will cover simple arithmetic, floating point numbers, graphs, algebra, calculus, derivatives, integrals and scripts.